The determination of serum BUN currently is the most widely used screening test for the evaluation of kidney function. The test is frequently requested along with the serum creatinine test since simultaneous determination of these 2 compounds appears to aid in the differential diagnosis of prerenal, renal and postrenal hyperuremia.
Kale is higher in fiber than lettuce. Leafy green vegetables like kale and lettuce are both rich in fiber and low in calories.Kale comes in deep green or purple colors. Lettuce varies in colors and varieties, including red and green romaine, iceberg and red leaf.iber Content. Kale is slightly higher in fiber content than lettuce. The high fiber content helps stabilize the leafy veggie during cooking. Insoluble fiber from kale and lettuce sweeps through your gut like a broom, pushing out waste.
Lettuce is most often used for salads, although it is also seen in other kinds of food, such as soups, sandwiches and wraps; it can also be grilled. One variety, the woju (è´è£), or asparagus lettuce (celtuce), is grown for its stems, which are eaten either raw or cooked.